Mazda P0102 & SCBS forward malfunction (smart city braking system)

[@1976wong]

You are a gentleman with your knowledge. Thank you for sharing.

[@kennedysgarage3281]

I have learned a lot since recording this video & put up far more on the Mazda’s. SCBS doesn’t ever give any issue, only engine based problems 😉👍👍

[@prashanshan7125]

Hi Well explained how one leads to another..thanks..

[@jimmydeewex]

Great info. Feb 2022 I had full decarbon done (20000km ago)2 weeks ago had to get gauze in sump replaced and all injector seals and washers aswell as sealing kit after oil pressure light came on. I was getting that horrible noise for a week and p0101(maf malfunction) that cleared itself up after couple days. Forward scbs light is staying on though. Took sensor off, cleaned it, cleaned the glass, cleaned around front bumper etc but still insists on staying on. Any help greatly appreciated. 2016 mazda 3 2.2 skyactive rubbish 🙈

[@kennedysgarage3281]

There is nothing wrong with your SCBS system, it is going to be coming up as a fault due to an engine management issue. So fix the engine faults and the SCBS fault will go away. It could possibly be an exhaust camshaft worn, but it is hard to say without seeing it 🤔🤔

[@jimmydeewex]

@@kennedysgarage3281 thanks for the reply. Watched the video and was hoping it wasn't camshaft 🙈 all engine faults have been cleared and fixed, so now your suggestion looks likely 😭💰💰

[@davidn5927]

Hello Peter, I appreciate your videos about Mazdas - very educational for me :-) I have a 2013 M6 2.2D AT and had recently blown head gasket, so after diy repair I am still watching the engine if everything is ok. So far so good (5000 km), but I have a feeling the fuel economy is since the repair slightly higher (10%). All the sensors (MAF, injector correction, pressures) are in common range. Could it be not propperly seated injector? I can observe a blow-by from oil opening on valve cover, it is regular - not paf-paf. It smells like exhaust but i can not see any smoke. Do have those diesel engines some PCV valve? Thank you very much.

[@kennedysgarage3281]

A head gasket repair on these is quite a large undertaking. I have spent 2 to 3 days doing them so well done 👏👏 I haven’t ever had any issues with PCV valves but the injector sealing washers very commonly fail. Did you replace the when doing the head gasket??

[@davidn5927]

@@kennedysgarage3281 thank you, it was very challenging for me, as an amateur spent many days on it. I put new washers, of course, but i didnt have the resurfacing tool kit, so i cleaned as much as i could without it. :-)

[@kennedysgarage3281]

@@davidn5927 if the engine cooling system doesn’t build pressure when cold you should be fine but worth checking 😉

[@davidn5927]

@@kennedysgarage3281 I am sorry for the confusion Peter. The head was proffesionaly resurfaced. I mean the injector holes are not 100% clean like a mirror. :-) So that is why i think, there is a potential for leaking.

[@kennedysgarage3281]

@@davidn5927 i understand, the injectors are relatively easy to remove & it might be worth pulling them out just to get a visual on the condition of the washers underneath 🤔🤔

[@ciprianraileanu4402]

Can visually being checked if exhaust camshaft worn & hydraulic tappets gone soft ?

[@kennedysgarage3281]

Camshaft being worn can only be proven by removing the injectors & rocker cover. But it is worn on 90% of them after 80 to 100,000 mls. A really common failure item

[@ferencvaradi6055]

Hello sir, i own a mazda cx-5 2013,i was speeding on the highway when it started shaking and rattling really agressively than the scbs and sbs malfunction lighted up but not engine check light. The car starts without any problem but shakes like crazy when speeding. I would really appreciate if you gave me your toughts about it

[@kennedysgarage3281]

It could quite possibly be an injector issue or the exhaust camshaft can give the same symptoms when worn due to the exhaust gases not being able to exit the cylinders. It is hard to pinpoint any more than that without seeing the car 😔😔

[@ferencvaradi6055]

It turned out to be an injector issue, thank you for your answer your content is really helpful sir !

[@kennedysgarage3281]

@@ferencvaradi6055 well done on the fix 💪💪 & I’m delighted to be able to help 🙏🙏

[@allynv]

Will the SCBS error message automatically come up if the engine light is on. I've an engine light, traction control light and SCBS message on. Only code I have is p0047. Turbo boost control A circuit low. I've just rebuilt the engine after it ceased. All is going good apart from these lights and error message. I don't have much boost on low revs either. But I think I've either mixed up vacuum lines or the plugs on the 2 turbo solenoid on top of gearbox. I hope lol

[@kennedysgarage3281]

The boost pressure sensor gets extremely blocked up with carbon & on a full rebuild it can be very easily overlooked 🤔 I will do a KZbin short tomorrow on the pipes and boost connectors, this could be handy 🤞

[@allynv]

That would be brilliant thanks. I did take photos of the lines but someone was there before me and had them marked as well. Maybe they out them on wrong, who knows. Thanks very much for that

[@rhyshorgan7961]

Scbs dpf inspection engine inspection light on I have power in my Mazda cx5 , got it cleaned guy it’s do turbo , how would I fix it thanks

[@kennedysgarage3281]

@@rhyshorgan7961 book it in with a competent garage and they should be able to sort it 🤞🤞

[@rhyshorgan7961]

@@kennedysgarage3281 got it sorted was turbo dpf costing 2k, hopefully no more silly problems , think I need replace wheel bearing noice drive motorway

[@kennedysgarage3281]

@@rhyshorgan7961 well done mate 💪💪💪

[@keithatkinson6141]

Another great video. My cx5 had a failed map sensor I also got SCBS and TPMS inspection required since fitting the new map sensor all is running well but the SCBS warning remains anyone have any info on what to do

[@-D0uble0-]

I've got scbs forward malfunction on 60k miles. Aslo DPF malfunction. Are these issues related?

[@kennedysgarage3281]

3 items can cause these problems. 1. intake manifold blocked 2. Exhaust pressure sensor A ( it has only 1 pipe) & check the pipe to it isn’t blocked 3. Exhaust camshaft & hydraulic tappets worn Very simple but a bit of time in repairing these issues 😉👍👍👍

[@-D0uble0-]

@@kennedysgarage3281 Thank you for the advice. Appreciate it!

[@kennedysgarage3281]

@@-D0uble0- 😉🙏

[@zzhughesd]

Exhaust Temperature Sensor No.1 SH01 187G Mazda 3 / 6 & CX-5 2.2 Diesel Skyactiv

[@RobertGallagher-mm3jw]

Hi Peter what sort of milage had that one done

[@kennedysgarage3281]

I cannot remember the exact mileage on this one but they all seem to hitting problems around 150,000 kms or 110,000 mls. Mazda recommend intake manifold decarb at 100,000 kms & it is well worth doing in order to avoid any Dpf related faults 😉

[@Imenijebitno108]

I have engine light, traction control and tyre pressure light and scbs forward malfunction. The automatic gearbox just goes in one gear and stick's with it and when I want to go in manual it only appears M no number of gear. And that only happens when I go downhill and brake for longer time. Help?

[@kennedysgarage3281]

You need to focus on the ‘engine management’ issue. All of the other faults you are having are only due to an engine malfunction. Fix the engine faults and every thing else will be ok 👍

[@Imenijebitno108]

@@kennedysgarage3281 Engine light goes away when I shut the car down. And all about engine is allright.

[@kennedysgarage3281]

@@Imenijebitno108 so if you clear all faults in all modules and drive then drive the car until a problem occurs, in what system does the problem occur?? I would believe at that stage you will see a fault in engine management, but wonders never seize 🤔

[@vegis91]

Ugh... problem still happening even though my Mazda dealership fully cleansed the EGR-valves on my Mazda cx-5 2016.

[@kennedysgarage3281]

It could be the injector sealing washers or the exhaust camshaft being worn. These are the next most common items to fail 🤞👍👍👍

[@vegis91]

@@kennedysgarage3281 Thank you so much for replying and the tip! Will be sure to mention this for the dealership next week 👍

[@pubgerr2612]

hi man, could you please help me. I have Mazda 6 2015 2.2diesel, 250 000km on clock. In the begining i receive scbs, tpms and check engine errors all together ( while i was on highway on high speed while i was in speed decrease or breaking). Now i get this errors together every next day even in city driving, but only when my speed is decreasing or right after the breaking. Car goes into safe mode and when i restart the car errors are gone.

[@kennedysgarage3281]

I would say this pipe or sensor is faulty, hopefully it will help Mazda 6 reduced power fault finding kzbin.info/www/bejne/hmLLeZSZlryXibs

[@MargaretteStrassel-u7f]

Elouise Ridge

[@theflyingmilkfloat]

Did you sort the scbs forward malfunction?

[@kennedysgarage3281]

Yes, I just contacted the owner & he has confirmed that it is still fixed. The camshaft & rockers give huge problems 👍

[@theflyingmilkfloat]

@@kennedysgarage3281 thanks for getting back to me. I've been getting that error pop up, that said it hasn't popped it's head up over the few days. The car feels like it has kangaroo juice at low speeds in 1st and 2nd gear but mainly when it's cold. Seems to get better once up to running temperature. The car is bugging me that bad I'd nearly be tempted to drive the 200 miles south for you to have a look at it!

[@kennedysgarage3281]

@@theflyingmilkfloat the exhaust camshaft seems to cause that driving issue a lot but take your time because I have another one in today that came from Kildare, it might be interesting to see the video on it 🤔

[@theflyingmilkfloat]

@@kennedysgarage3281 I've subscribed and following. Watching with interest bud

[@BuenaRieland-t9t]

Torphy Route

[@kennedysgarage3281]

@@BuenaRieland-t9t ??